Nickel ion-free blue glass composition
USRE34639E · kind E · reissue
4Cited by
15References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1992 |
| Grant date | Jun 14, 1994 |
| Priority date | — |
| Expiry date | Sep 10, 2012 |
Classification
- Technology area (CPC —)General
Abstract
A blue glass composition is disclosed. This blue glass composition is based on a standard formulation for soda/lime silica glass, except that neither the basic glass composition nor the coloring components therefor contains nickel. The blue glass color is developed by using coloring components consisting essentially of 0.3-0.6% Fe.sub.2 O.sub.3, 0.004-0.008% .[.Co.sub.3 O.sub.4 .]. .Iadd.Co, .Iaddend.and is a neutral blue having a dominant wavelength of 482 nm.+-.1 nm, color purity of 13%.+-.1% and transmission (T) equal to at least 54%.+-.1% using Illuminant C (corrected to 0.25 inch glass thickness).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.